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Effects of hypo- and hyper-thyroidism on in vivo lipogenesis in fed and fasted rats.

Título : Effects of hypo- and hyper-thyroidism on in vivo lipogenesis in fed and fasted rats.
Autor : Llobera i Sande, Miquel
Herrera Castillón, Emilio.
Muniesa, Ana
Materias: Lipogenesis.Hypothyroidism.Hyperthyroidism.Adipose tissue.Liver.
Resumen : 1.8 or 25 µg of L-thyroxine/100 g body wt. were compared with intact controls (C). The appearance of radioacitvity in fatty acids 30 min after the i.p. injection•of (3-14C)pyruvate was reduced in adipose tissue and enhanced in liver of T+25, being no differences between the other groups and C. ( 14C)- Fatty acids are reduced with 3 h of fasting only in the adipose tissue of T+ 1.8 and C, while 24 h produces a reduction in liver in the T+ 1.8, T+25 and C, and in adipose tissue in the T+l.8 and C animals. The highest percentage of radioactivity was observed in the liver glyceride glycerol fraction, being greater in T+25 than in the other groups. Fasting produces an increment in the ( 14C)-glyceride glycerol fraction. being significant only in the hypothyroid animals in both liver and adipose tissue. The most sensitive parameter to fasting was the formation of ( 14C)-non-saponifiable lipid in both the C and T+ 1.8 animals, while it does not change in T+0 or T+0.I, but is enhanced within 24 h in the adipose tissue of T + 25. It is proposed that most of the observed changes are due to the other endocrine disfunction s which appear in hypo- and hyperthyroidism, as the in vivo results do not comply with in vitro effects of thyroxine on lipogenesis of others.
Descripción : En: Hormone Metabology Reseach ISSN 0018-5043 1979. n. 11, pp 628-634
URI : http://hdl.handle.net/10637/1008
Derechos: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
Fecha de publicación : 19-sep-1979
Centro : Universidad San Pablo-CEU
Aparece en las colecciones: Facultad de Farmacia





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